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Problem 2


7.5 Small-Sample Confidence Intervals for a Population Mean

A medical study designed to determine how much water is needed to become properly hydrated was conducted using 26 subjects. The average amount of water required daily by the subjects to be fully hydrated was 53.6 ounces with a standard deviation of 10 ounces. Form a 90% confidence interval to estimate the true average amount of water needed to become fully hydrated. Does this interval contradict the long standing belief that the average person requires 64 ounces of water per day to be fully hydrated?


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